we know that
To find out the fraction of a pan of brownies that was left subtract [tex]1\frac{1}{5}[/tex] from [tex]2[/tex]
remember that
[tex]1\frac{1}{5}=(1*5+1)/5=\frac{6}{5}[/tex]
so
[tex]2-\frac{6}{5} =(2*5-6)/5=\frac{4}{5}[/tex]
therefore
the answer is
the fraction of a pan of brownies that was left is [tex]\frac{4}{5}[/tex]
